Artificial denture



Feb. 10, 1931. KRASNQFF 1,792,226

ARTIFICIAL DENTURE Filed Feb. 20, 1928 INVENTOR fierzzarg; KrQIInDo/ PATTORNEYS Patented Feb. 10, 1931 PATENT oFFicE BERNARD KRASNOFF, orBROOKLYN, NEW YORK ARTIFICIAL nmv'runn Application filed'February 20,1928. Serial 170,255,801.

My invention relates to means for retaining artificial dentures, such asremovable plates and bridge work, in place in the mouth, and the samehas for its object more particularly to provide a simple, efiicientandcomfor-table device which serves to supplement the plate or bridgestraddling'the gum or the anchorages thereof, or both, in retaining thesame in place, and which readily permits of 1 the removal and insertionof the denture.

Further, said invention has for its object to provide a device of thecharacter specified which isattached to the plate and extends beyond thesame in engagementwith the gum for retaining the plate in place.

Further, said invention has for its object to provide a device of thecharacter specified .in which the gum engaging extension or tongueconforms to the contour of the surface of the gum to effect acomfortable extended surface engagement therewith.

Further, said invention has for its object to provide a device of thecharacter specified in which the gum engaging extensions are adjustablyattached to the plate to facilitate J the insertion and removal of thedevice 111120 and from the mouth.

Other objects will in part be obvious, and in part be pointed outhereinafter.

To the attainment of the aforesaid objects and ends, my inventionconsists in the novel features of construction, and in the combination,connectionand arrangement of parts hereinafter more fully described andthen pointed out in the claims.

In the accompanying drawing:

Fig. 1 is a perspective view showing one form of device constructedaccording to and embodying my said invention;

Fig. 2 is a side view thereof;

Fig. 3 is a detail view partly in section;

Fig. 4 is a rear view of the gum engaging extension or tongue;

Fig. 5 is a transverse sectional view thereof; on the line 5-5 of Fig.2;

Fig. 6 is a side view showing a modification; and

Fig. 7 is a sectional view thereof. Referring to the drawing, I haveillustrated the denture as applied to the upper place comprises a pairofextensions or gum A. The denture consists of the usual plate 12straddling the gum and having the artificial teeth 14 set therein. a

- The means for retaining the=denture in tongues 18 which extendupwardly from the plate 12 and inwardly towards each other.

The tongues or extensions 18 conform in contour with the contour of thesurface of the" gum with which they engage, and the sameare curved toextend over the bulging portion of the gum, as indicated atfl-B, intothe hollow or recessed portion thereof, as indicated at C. The contourof the tongues 18- is obtained from the impressions taken of the jaw inthe same manner that the contour-of-the plate 12 I "isobt'ained.

'As illustrated at Figs. 1 to 5, the plate12 is provided withrelativelythickened portions 20 having sockets '22 therein to receive the prongs24 of the members 18. The gum engaging portions 20 are separate at thefront to'expose the natural gum,t-he" lengthwise movable members 18extending inwardly towards each other from the separated portions 75 20and engaging the gum therebetween. The. pron'gs24: are preferably:slotted at the ends 26 thereof to provide ares ilient frictionalengagement with their sockets '22 to permit of thesliding adjustmentthereof."

At Figs.f6 and 7 therelatively thickened portions 20 are providedwithslots orrecesses 28 in which the L-shaped prongs 30 of the members18a are received, providing a close fit and a frictional slidingengagement. The angular ends of the prongs 30 lirnit the outward travelof the members 18a. A plate 32 secured by screws 34; serves to retainthe members 18a in place with the prongsSO thereof within the slots orsockets '28.

When the members 18, 18a are partially pulled out of their sockets, thedevice canbe readily placed in the mouth and secured in position bypushing the members 18, 18a into their sockets to cause said members tofirm 95 ly engage the gum.'"The device is" readily removed by partially'pulling'out the said members 18, 18a'to release their engagement withthe gum. r 7

the tongues 18, 18a, engaging over the ridge B of the gum and extendinginto the depression C thereof, securely retain the denture in place,exerting a gentle and evenly distributed pressure over the surface ofthe gum, and providing an efiicient holding device Whichmay be wornwithcomfort, The, members 18,;l8h may ibe rea'dilyremoved and replaced asrequired. The subjectmatter of my invention disclosed herein and notclaimed is disclosed and dlaime rl an eopending application Serial No.255,800, filed February 20, 1928.

Iclaim: V. p 1. A device of the character'des'cribedcomprising :a platehaving t'eeth thereon, and a separate "tongue projecting. from i saidplate and adapted to engage an exposed; portionof :the :natural gum f-orsecuringcthe'idevice in :place, said tongueabelng sl-idable -relative tosaid: plate to secure and release the device.

2. VA device of the character described comname-hereto.

secured within said recesses, and a member movement into and out ofengagement with said gum portion to secure the device in place and torelease the same.

zlnctestimon'y whereof, I have signedmy ."BERNARD LKRA'sNoFF.

prising .;a :platefhavirigagum engaging :por-

.tion,:and atongue member thereon extending circumferentially of the gumand substantially conforming in contour therewith, said tongue memberbeing connected to said; gum engaging i portion :for lengthwise movement:to secure. the device'inipla'ce and to 'release the Y same.

i 3. A device of the character described comprising a plate having a gumengagingpor- .tion provi'dedwith a socket. .and. a=gum engaging memberextending circumferentially of the gum and sli'dably received. atli'tsinner end within said socket, said :gu1n;engaging member beingadjustable within 'the' =socket thereoffor securing and:releasingthe-device.

at. A. device of thecharacter describedeomsprising a plate havingartificial :t-eeth thereon, a :pair ofrmembers sprojectin-g upwardlyfrom-said plate andengaging the; gum-beyond the same; said members beingslidablyrat- 'tachedtotsaidp'late. e.

5. A device'of he charac:ter-desc1* ibedcomprising faiplate'zhavin'gartificial. teeth :thereon anda socketipnrtion an d .azgum engagingmember having a pronged portion secured with'in' said socket port1:on,and tsli'dable therein, e

1'6. "A device"of thechara'ct er describedtcomprising a plate"liavingfartificialteeth" there-'on,andrel'ativelythickenedportionsadjacent to the ends thereof fprovidedfwith sockets, and members havingjproiigs slidably'secured ,within'said sockets, extending; inwardly towards each other above saidfpl'ate;said membersconformingin contourwiththe'conr t1ie sl en a ed h y.

,7. Adeviceof tliei'character.describedcomap ng afr te i ar srr ifi l eehher on, and y a relatively r'thickened "portion -provided withrecesses, a gum engagingfmember. provided with 'L-shaped prongsradjlust'ably

